The LM2747MTC/NOPB(购买请点击) is a high-speed synchronous buck regulatocontroller with a feedback voltage accuracy of ±1%. It canprovide simple down conversion to output voltages as low as0.6V. Though the control section of the IC is rated for 3 to 6V,the driver section is designed to accept input supply rails ashigh as 14V. The use of adaptive non-overlapping MOSFETgate drivers helps avoid potential shoot-through problemswhile maintaining high efficiency. The IC is designed for themore cost-effective option of driving only N-channel MOSFETsin both the high-side and low-side positions. It sensesthe low-side switch voltage drop for providing a simple,adjustable current limit.
The LM2747MTC/NOPB(购买请点击) features a fixed-frequency voltage-mode PWMcontrol architecture which is adjustable from 50 kHz to 1MHz with one external resistor. In addition, the LM2747MTC/NOPB(购买请点击) alsoallows the switching frequency to be synchronized to anexternal clock signal over the range of 250 kHz to 1 MHz.This wide range of switching frequency gives the powersupply designer the flexibility to make better tradeoffs betweencomponent size, cost and efficiency.
Features include the ability to startup with a pre-biased loadon the output, soft-start, input undervoltage lockout (UVLO)and Power Good (based on both undervoltage and overvoltagedetection). In addition, the shutdown pin of the IC can beused for providing startup delay, and the soft-start pin can beused for implementing precise tracking, for the purpose ofsequencing with respect to an external railLM2747MTC/NOPB(购买请点击).
Features
±1% feedback voltage accuracy over temperature;
Switching frequency from 50 kHz to 1 MHz;
Switching frequency synchronize range 250 kHz to 1MHz;
Startup with a pre-biased output loadLM2747MTC/NOPB(购买请点击);
Power stage input voltage from 1V to 14V;
Control stage input voltage from 3V to 6V;
Output voltage adjustable down to 0.6V;
Power Good flag and shutdown;
Output overvoltage and undervoltage detection;
Low-side adjustable current sensing;
Adjustable soft-start;
Tracking and sequencing with shutdown and soft startpins;
TSSOP-14 package。
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